I have a 05 Denali with a 2/3 drop and it has started clunking in the front on either side (mostly left though and rarely in the rear). I work at a dealership and i had someone check it out and they looked over thing it was all tight and such and he check ball joints and what not. Any ideas? He thought maybe it was the brakes sticking because I can hear it when I brake. Thats when it happens it seams like something shifts and it clunks. It happens under about 15mph. Thanks